General Science MCQ - here learn and test online gs mcq questions and answers, you can practice lots of general science quiz questions.
1) Brass gets discoloured in air because of the presence of which of the following gases in air?
2) Which of the following is a non metal that remains liquid at room temperature?
4) Which of the following is used in pencils?
5) Which of the following metals forms an amalgam with other metals?
10) Which of the gas is not known as green house gas?